Question: Who is the {landmark} for {official residence} of {Parthian Empire}
Paraphrase: Who is the {point of interest} for {official home} of {Parthian Domain}
SPARQL (Wikidata):  select distinct ?obj where { wd:Q1986139 wdt:P263 ?obj . ?obj wdt:P31 wd:Q2319498 } 
Answer: Susa